Television is so awful, and students watch so much of it, that it's not surprising that there's been much sociological research on its effects. Most of the studies, though, suffer from the third-factor effect - yes, student who watch a lot of TV tend to be more aggressive, but could a third factor explain both behaviors? Student with lower IQ scores also tend to watch more TV and be more violent, as do person from poorer families. The correlations between heavy TV watching and other behaviors could be merely effects from common causes.
